______ it is true that a student’s most important goal is to do well in his or her studies, it doesn’t need to be the only goal.
| A．When | B．As | C．While | D．Before |
By the time Jack r
eturned home from England, his son. from college.
| A．graduated | B．has graduated |
| C．had been | D．had graduated |
a strange plant! I've never seen it before.
| A．Which | B．What | C．How | D．Whether |
When the news came the war broke out, he decided, to serve in the army.
| A．since | B．which | C．that | D．because |
Bring the flowers into a warm roomthey'll soon open.
| A． | or | B． | and | C． | but | D． | for |
around the fire, the tourists danced with the local people.
| A．Gather | B．To gather |
| C．Gathering | D．To be gathering |